EP1278896A1 - A method and an apparatus for recovery of metals - Google Patents

A method and an apparatus for recovery of metals

Info

Publication number
EP1278896A1
EP1278896A1 EP01934698A EP01934698A EP1278896A1 EP 1278896 A1 EP1278896 A1 EP 1278896A1 EP 01934698 A EP01934698 A EP 01934698A EP 01934698 A EP01934698 A EP 01934698A EP 1278896 A1 EP1278896 A1 EP 1278896A1
Authority
EP
European Patent Office
Prior art keywords
fines
burner
flame
furnace
metallic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01934698A
Other languages
German (de)
French (fr)
Other versions
EP1278896B1 (en
Inventor
Henrik Gripenberg
Joachim Von Scheele
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGA AB
Original Assignee
AGA AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AGA AB filed Critical AGA AB
Publication of EP1278896A1 publication Critical patent/EP1278896A1/en
Application granted granted Critical
Publication of EP1278896B1 publication Critical patent/EP1278896B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/02—Working-up flue dust
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the present invention relates generally to a method and an apparatus for recovery of metals and more particularly for recovery of metals from metallic fines.
  • recovery is often a preferred solution to the above- mentioned problem of taking care of the dust.
  • recovery often means some kind of external processing, resulting in transportation to plants and processes lying beside the normal chain of processes.
  • An object of the present invention is to provide a method and an apparatus for recovery of metals from metallic fines in which the above-mentioned drawbacks with known techniques are avoided or at least mitigated.
  • the invention is based on the realisation that metallic fines normally have a known composition and therefore fines in metallic form can be returned directly to a process without essentially altering the chemical composition of the fines, including avoiding oxidation as far as possible, thus enabling the creation of an effective internal cycle of operations .
  • the melting process can be controlled in a satisfying way, avoiding burning of the fines supplied to the burner. Also, with the inventive method and burner arrangement, it has unexpectedly been found that excessive oxidation of the resulting product can be avoided, thereby enabling recovery of metals in an easy and cost-efficient way.
  • FIG. 1 is a schematic diagram of a plant according to the invention for recovery of metals from fines or dust
  • FIG. 2 is a sectional view of a burner used with the method according to the invention
  • FIG. 3 is a cross-sectional view of the burner shown in figure 2 ,
  • FIG. 4 shows dust of fines used with the method according to the invention.
  • FIG. 5 shows agglomerate resulting from the method according to the invention.
  • FIG. 10 an overall diagram of a plant for recovery of metals, generally designated 10, is shown.
  • the plant is built around a burner 20 installed in a sidewall of a furnace 30.
  • the burner is a so-called oxy-fuel burner and is thus supplied with fuel, such as fuel oil, propane, natural gas, or butane through a first feeding line 21 and with oxygen through a second feeding line 22.
  • fuel such as fuel oil, propane, natural gas, or butane
  • oxygen is in this context meant a gas with an 0 2 content exceeding 21% and preferably so-called technical oxygen having an 0 2 content of 90-99.5%.
  • Fines or dust are supplied through a third feeding line 23. From the following description, it is clear that the inventive method is applicable to essentially metallic products with a diameter less than approxi- mately 5 millimetres. Thus, both fines, normally meaning products resulting from crushing and sintering, and dust, normally meaning products collected in filters, are possible raw material for use with the inventive method as well as other equivalent materials, such as powder.
  • the third feeding line 23 is also connected to a feeder, generally designated 40.
  • the feeder 40 comprises a silo 42, into which metallic fines (shown in figure 4) are fed.
  • the fines are directed from the silo 42 to a pressure vessel 44, from which they are further directed to the third feeding line 23 connected to the burner 20.
  • the furnace 30 is a so-called electric arc furnace. This includes a number of electrodes 32 supplying the furnace with electric power used for melting the material in the furnace, as is conventional. Thus, in the bottom of the furnace there is gathered a charge 34 resulting from the material supplied to the furnace 30.
  • the burner 20 comprises a main portion 24, to which the three supply lines 21- 23 shown in figure 1 are connected.
  • the portion 24 is provided with an essentially circular cross-section, see figure 3, in which the configuration of the supply lines 21-23 appears in more detail.
  • Fuel is supplied through the first supply line 21 in the form of six equidistant pipes 21a-f placed on a constant distance from the centre axis of the main portion 24.
  • Oxygen is supplied through an annular outer portion 22 and thus surrounds the fuel supplied through the pipes 21a-f.
  • fines are supplied through the pipe 23, which is co-axially placed in the burner.
  • the burner 20 is mounted in the sidewall of the furnace 30.
  • the burner can be tilted, i.e., can be positioned in different angles relative to the horizontal and the vertical .
  • the different orientations can be used for obtaining desired characteristics for the melting process.
  • fines are supplied to the silo 42 of the feeder 40.
  • the fines used in the described process are metallic particles in metallic form with low oxide content.
  • the fines normally have a diameter of less than one millimetre and can be for example of ferro-silicon, ferro-chromium, or iron powder.
  • the fines fall from the silo and into the pressure vessel 44, wherein the pressure is maintained by means of a gas also functioning as a carrying gas, such as compressed air, nitrogen or argon.
  • a gas also functioning as a carrying gas, such as compressed air, nitrogen or argon.
  • the fines are then carried to the oxy-fuel burner 20 at a rate, which is determined by the pressure level in the vessel 44, the amount of fines in the silo 42 etc.
  • the injection and melting has been at a rate of 3.5 tonnes per hour in an electrical arc furnace and the melted fines have been a perfect replacement for other raw materials, such as scrap and alloy additions.
  • the operation of the oxy-fuel burner 20 is controlled by means of the amount of fuel and oxygen supplied through the first and second supply lines 21 and 22, respectively.
  • the supply lines are connected to sources of fuel and oxygen (not shown), as is conventional .
  • Fines are supplied through the central feeding pipe 23 at a rate that is controlled by the feeder.
  • Fuel is supplied in the six fuel feeding pipes 21a-f, see figure 3, while an envelope of oxygen is supplied through the annular feeding area 22.
  • the oxy-fuel mixture results in a flame 25 having properties, such as length, temperature etc . , that are controlled by the supply rate of fuel and oxygen.
  • the fines are injected into the central portion of the flame 25.
  • the fines injected into the flame 25 are brought to agglomerate, thus creating agglomerates 60 of a larger size than the fines supplied to the burner.
  • a typical size of the agglomerates was 3-8 millimetres, see figure 5, which shows ferro-chromium agglomerates 60 produced by means of the inventive method from dust or fines with a diameter of less than 1 millimetre.
  • the agglomeration process is controlled by means of several parameters, of which can be mentioned: temperature and velocity of the flame 25, energy content or density of the injected fines, stochio- etry, i.e., the ratio oxidising gas to added fuel, the oxygen content of the oxidising gas, the supply rate of oxygen and added fuel, the rate of injection of fines and their characteristics, the travel time of the fines in the flame, and burner characteristics and configuration, such as tilting.
  • the flame is preferably controlled so as just the surface of the fines injected through the burner is brought to melt. It is believed that this promotes the agglomeration process, i.e., fines with liquid surfaces tend to stick together, thus creating the desired agglome- rates. It is also believed that the fuel partially shields the fines from oxygen, thus reducing the level of oxidation.
  • the created agglomerates fall to the bottom of the furnace 30, wherein they are added to the charge 34.
  • the heat from the furnace brings the agglomerates to melt, thus converting them into useable form.
  • An advantage with the method according to the invention is that the level of oxidation of the fines is very low.
  • One possible reason for this can be that the fines are shielded from the oxygen by the carrying gas, which preferably has a low oxygen content, i.e., less than 21%.
  • an electric arc furnace 30 has been shown.
  • the method according to the invention is equally applicable to other kinds of furnaces, such as induction furnaces, reverberatory furnaces, and electrically heated furnaces.
  • Fines and dust with a diameter of up to one millimetre have been described as the material supplied to the furnace.
  • metallic particles with a diameter of up to 5 millimetres are conceivable.
  • the burner is positioned in a sidewall of a furnace.
  • suitable positions such as in the upper part of the furnace.
  • a configuration with more than one burner is also possible.
  • the fines are fed to the furnace by means of a feeder.
  • the fines sup- plied to the furnace could also be free-flowing, carried by means of a feed gear etc .
  • a dry starting material has been shown in the figures .
  • a suitable feeding arrangement comprising a feed screw, for example.
  • the wet part is vaporised by the high temperature of the flame, resulting in exhausts rising through the furnace 30 and subsequently leaving through an exhaust outlet (not shown).
  • the fines are then brought to agglomerate in the above-described way.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

A method for recovery of metals from essentially metallic fines comprises the following steps: supplying said essentially metallic fines to a flame of a burner (20), bringing said fines to agglomerate by means of heat from the flame without essentially changing the chemical composition thereof, thereby providing an essentially metallic agglomerated product. The agglomerated product is subsequently recovered, preferably in a furnace (30). By means of the method, the recovery of metals is facilitated. An apparatus for performing the method is also provided.

Description

A METHOD AND AN APPARATUS FOR RECOVERY OF METALS
FIELD OF INVENTION
The present invention relates generally to a method and an apparatus for recovery of metals and more particularly for recovery of metals from metallic fines.
BACKGROUND
Large amounts of metallic dust, powder or fines are created in different processes in metallurgic industry, among other things from disintegration and screening. Another area in which metallic fines are collected is in gas filters or wet scrubbers, for example. The handling and recovery of these fines are often difficult and costly problems. The pressure from both public authorities and customers to find new solutions is constantly increasing. The earlier solution of landfilling is no longer a feasible solution and is in many countries illegal. Existing techniques for conversion and recovery are costly.
From an economical and environmental point of view, recovery is often a preferred solution to the above- mentioned problem of taking care of the dust. However, recovery often means some kind of external processing, resulting in transportation to plants and processes lying beside the normal chain of processes.
It is very difficult to return dust or fines directly to a furnace because its tendency to burn. Furthermore, due to the low weight of dust and fines, they are easily carried away by the gas to be mixed with the exhaust from the furnace, thus lowering the yield and constituting an environmental hazard.
A known solution to these problems is pelletization or briquetting of the dust or fines for subsequent feeding to a furnace. However, this solution is accompanied with the problem of extra costs for a separate plant for pelletization and binding agent.
In the case the fines are intermixed in a sludge or slurry, such as when the fines are recovered from wet scrubbers, there is a problem of extra costs for a separate plant for drying and the waste material.
Processes for the recovery of metals are described in the patent documents EP-Al-0618419, US-A-5, 108,496, US-A-6,001,148, and JP 8295956. However, all these documents relates to processes wherein the starting material comprises non-metallic material, such as oxides .
SUMMARY OF THE INVENTION
An object of the present invention is to provide a method and an apparatus for recovery of metals from metallic fines in which the above-mentioned drawbacks with known techniques are avoided or at least mitigated.
The invention is based on the realisation that metallic fines normally have a known composition and therefore fines in metallic form can be returned directly to a process without essentially altering the chemical composition of the fines, including avoiding oxidation as far as possible, thus enabling the creation of an effective internal cycle of operations .
According to a first aspect of the present invention there is provided a method for recovering of metals as defined in claim 1.
According to a second aspect of the present invention there is provided an apparatus for recovering of metals as defined in claim 13.
With the method and the apparatus according to the in- vention, the problems of prior art are overcome or at least mitigated.
By using an oxygen-enriched gas with a burner, the melting process can be controlled in a satisfying way, avoiding burning of the fines supplied to the burner. Also, with the inventive method and burner arrangement, it has unexpectedly been found that excessive oxidation of the resulting product can be avoided, thereby enabling recovery of metals in an easy and cost-efficient way.
BRIEF DESCRIPTION OF DRAWINGS
The invention is now described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a plant according to the invention for recovery of metals from fines or dust,
FIG. 2 is a sectional view of a burner used with the method according to the invention, FIG. 3 is a cross-sectional view of the burner shown in figure 2 ,
FIG. 4 shows dust of fines used with the method according to the invention, and
FIG. 5 shows agglomerate resulting from the method according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
In the following, a detailed description of the method and the apparatus according to the invention will be given. Starting with figure 1, an overall diagram of a plant for recovery of metals, generally designated 10, is shown. The plant is built around a burner 20 installed in a sidewall of a furnace 30. The burner is a so-called oxy-fuel burner and is thus supplied with fuel, such as fuel oil, propane, natural gas, or butane through a first feeding line 21 and with oxygen through a second feeding line 22. By oxygen is in this context meant a gas with an 02 content exceeding 21% and preferably so-called technical oxygen having an 02 content of 90-99.5%.
Fines or dust are supplied through a third feeding line 23. From the following description, it is clear that the inventive method is applicable to essentially metallic products with a diameter less than approxi- mately 5 millimetres. Thus, both fines, normally meaning products resulting from crushing and sintering, and dust, normally meaning products collected in filters, are possible raw material for use with the inventive method as well as other equivalent materials, such as powder.
The burner 20 will be described in more detail below with reference to figures 2 and 3.
The third feeding line 23 is also connected to a feeder, generally designated 40. The feeder 40 comprises a silo 42, into which metallic fines (shown in figure 4) are fed. The fines are directed from the silo 42 to a pressure vessel 44, from which they are further directed to the third feeding line 23 connected to the burner 20. By means of this arrangement, a desired supply rate of fines to the burner 20 is ensured.
In the exemplary plant shown in figure 1, the furnace 30 is a so-called electric arc furnace. This includes a number of electrodes 32 supplying the furnace with electric power used for melting the material in the furnace, as is conventional. Thus, in the bottom of the furnace there is gathered a charge 34 resulting from the material supplied to the furnace 30.
The burner 20 will now be described in detail with reference to figures 2 and 3. The burner 20 comprises a main portion 24, to which the three supply lines 21- 23 shown in figure 1 are connected. The portion 24 is provided with an essentially circular cross-section, see figure 3, in which the configuration of the supply lines 21-23 appears in more detail. Fuel is supplied through the first supply line 21 in the form of six equidistant pipes 21a-f placed on a constant distance from the centre axis of the main portion 24. Oxygen is supplied through an annular outer portion 22 and thus surrounds the fuel supplied through the pipes 21a-f. Finally, fines are supplied through the pipe 23, which is co-axially placed in the burner.
As already mentioned, the burner 20 is mounted in the sidewall of the furnace 30. In the preferred embodiment, the burner can be tilted, i.e., can be positioned in different angles relative to the horizontal and the vertical . The different orientations can be used for obtaining desired characteristics for the melting process.
In the following, the method for recovering metals will be described in detail.
Initially, fines are supplied to the silo 42 of the feeder 40. The fines used in the described process, see figure 4, are metallic particles in metallic form with low oxide content. The fines normally have a diameter of less than one millimetre and can be for example of ferro-silicon, ferro-chromium, or iron powder.
The fines fall from the silo and into the pressure vessel 44, wherein the pressure is maintained by means of a gas also functioning as a carrying gas, such as compressed air, nitrogen or argon. By means of the pressure in the pressure vessel 44, the fines are then carried to the oxy-fuel burner 20 at a rate, which is determined by the pressure level in the vessel 44, the amount of fines in the silo 42 etc. In an exemplary plant, the injection and melting has been at a rate of 3.5 tonnes per hour in an electrical arc furnace and the melted fines have been a perfect replacement for other raw materials, such as scrap and alloy additions.
The operation of the oxy-fuel burner 20 is controlled by means of the amount of fuel and oxygen supplied through the first and second supply lines 21 and 22, respectively. The supply lines are connected to sources of fuel and oxygen (not shown), as is conventional .
The operation of the burner 20 will now be described in detail with reference to figures 2 and 3. Fines are supplied through the central feeding pipe 23 at a rate that is controlled by the feeder. Fuel is supplied in the six fuel feeding pipes 21a-f, see figure 3, while an envelope of oxygen is supplied through the annular feeding area 22. The oxy-fuel mixture results in a flame 25 having properties, such as length, temperature etc . , that are controlled by the supply rate of fuel and oxygen. The higher oxygen content, the higher temperature, resulting in a theoretical flame temperature of 1900-2500°C. Thus, the fines are injected into the central portion of the flame 25.
As is seen from figure 2, the fines injected into the flame 25 are brought to agglomerate, thus creating agglomerates 60 of a larger size than the fines supplied to the burner. During some experiments performed with the inventive method, a typical size of the agglomerates was 3-8 millimetres, see figure 5, which shows ferro-chromium agglomerates 60 produced by means of the inventive method from dust or fines with a diameter of less than 1 millimetre.
The agglomeration process is controlled by means of several parameters, of which can be mentioned: temperature and velocity of the flame 25, energy content or density of the injected fines, stochio- etry, i.e., the ratio oxidising gas to added fuel, the oxygen content of the oxidising gas, the supply rate of oxygen and added fuel, the rate of injection of fines and their characteristics, the travel time of the fines in the flame, and burner characteristics and configuration, such as tilting.
In order to minimise oxidation of the fines, melting of the injected material should be minimised. Thus the flame is preferably controlled so as just the surface of the fines injected through the burner is brought to melt. It is believed that this promotes the agglomeration process, i.e., fines with liquid surfaces tend to stick together, thus creating the desired agglome- rates. It is also believed that the fuel partially shields the fines from oxygen, thus reducing the level of oxidation.
The created agglomerates fall to the bottom of the furnace 30, wherein they are added to the charge 34. The heat from the furnace brings the agglomerates to melt, thus converting them into useable form.
An advantage with the method according to the invention is that the level of oxidation of the fines is very low. One possible reason for this can be that the fines are shielded from the oxygen by the carrying gas, which preferably has a low oxygen content, i.e., less than 21%.
A preferred embodiment of the method and the apparatus according to the invention has been described. The person skilled in the art realises that this can be varied within the scope of the appended claims. Thus, although an oxy-fuel burner 20 has been shown, other equivalent burners, such as plasma burners, can be used as long as desired oxygen levels exceeding 21% are obtained.
Furthermore, an electric arc furnace 30 has been shown. The method according to the invention is equally applicable to other kinds of furnaces, such as induction furnaces, reverberatory furnaces, and electrically heated furnaces.
Fines and dust with a diameter of up to one millimetre have been described as the material supplied to the furnace. However, metallic particles with a diameter of up to 5 millimetres are conceivable.
Although in the description the fines are said to only partly melt it is also possible with a complete melting thereof, as long as the desired agglomerates are obtained without essentially altering the chemical composition of the supplied metallic material, i.e., with low or no oxidation.
Also, in the described embodiment, the burner is positioned in a sidewall of a furnace. However, it is realised that other suitable positions are possible, such as in the upper part of the furnace. Also, a configuration with more than one burner is also possible.
In the described embodiment, the fines are fed to the furnace by means of a feeder. However, the fines sup- plied to the furnace could also be free-flowing, carried by means of a feed gear etc .
A dry starting material has been shown in the figures . In the case the fines are intermixed in a liquid, such as water or sludge, a suitable feeding arrangement must be provided, comprising a feed screw, for example. Also, when arriving to the furnace, the wet part is vaporised by the high temperature of the flame, resulting in exhausts rising through the furnace 30 and subsequently leaving through an exhaust outlet (not shown). The fines are then brought to agglomerate in the above-described way.

Claims

1. A method for recovery of metals from essen- tially metallic fines, comprising the following steps:
a) supplying said essentially metallic fines (50) to a flame (25) of a burner (20),
b) bringing said fines to agglomerate by means of heat from said flame (25) without essentially changing the chemical composition thereof, thereby providing an essentially metallic agglomerated product (60), and
c) recovering said agglomerated product (60).
2. The method according to claim 1, wherein said burner (20) is an oxy-fuel burner.
3. The method according to claim 1 or 2, wherein said burner is supplied with an oxidising gas having an 02 content of at least 21% 02.
4. The method according to claim 3, wherein said burner is supplied with an oxidising gas having an 02 content of at least 90% 02.
5. The method according to any of claims 1-4, wherein said metallic fines (50) are ferro-silicon, ferro-chromium, or iron powder.
6. The method according to any of claims 1-5, wherein said metallic fines (50) have a diameter of less than approximately 5 millimetres, and more preferably a diameter of less than approximately 1 millimetre.
7. The method according to any of claims 1-6, wherein the step c) of recovering said agglomerated product (60) comprises feeding said product to a furnace.
8. The method according to claim 1-7, wherein the recovering of step c) is performed in one of the following furnace types: an electric arc furnace, an in- duction furnace, a reverberatory furnace, or an electrically heated furnace.
9. The method according to any of claims 1-8, wherein the agglomeration process of step b) is controlled by means of at least some of the following parameters : temperature and velocity of said flame (25), energy content or density of said fines (50), the ratio oxidising gas to added fuel of said burner (20), the oxygen content of said oxidising gas, the supply rate of oxygen and added fuel, the supply rate of said fines and their characteristics, the travel time of said fines in said flame, and burner characteristics and configuration, such as tilting.
10. The method according to any of claims 1-9, wherein at the agglomeration process of step b) is controlled so at least some of said fines (50) are only partly melted.
11. The method according to any of claims 1-10, wherein step a) comprises supplying said fines (50) essentially to the central portion of said flame (25).
12. The method according to any of claims 1-11, wherein said fines are intermixed in a liquid, and wherein step b) comprises bringing said liquid part to vaporise by means of said flame.
13. An apparatus for recovery of metals from essentially metallic fines, comprising:
- a burner (20) having a flame (25) during operation thereof,
a feeder (40) connected to said burner for supplying essentially metallic fines (50) to said flame (25) of said burner (20),
- a device (21,22) for controlling the flame (25) of said burner (20) so as to agglomerate said fines by means of heat from said flame without essentially changing the chemical composition of said fines, thereby providing an essentially metallic agglomerated product (60), and
a device (30) for recovering said agglomerated product (60) .
EP20010934698 2000-05-05 2001-05-03 A method and an apparatus for recovery of metals Expired - Lifetime EP1278896B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0001661A SE518531C2 (en) 2000-05-05 2000-05-05 Methods for recycling metals
SE0001661 2000-05-05
PCT/SE2001/000947 WO2001086011A1 (en) 2000-05-05 2001-05-03 A method and an apparatus for recovery of metals

Publications (2)

Publication Number Publication Date
EP1278896A1 true EP1278896A1 (en) 2003-01-29
EP1278896B1 EP1278896B1 (en) 2006-08-09

Family

ID=20279559

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010934698 Expired - Lifetime EP1278896B1 (en) 2000-05-05 2001-05-03 A method and an apparatus for recovery of metals

Country Status (19)

Country Link
US (1) US6989043B2 (en)
EP (1) EP1278896B1 (en)
JP (1) JP2003532796A (en)
KR (1) KR100766346B1 (en)
AT (1) ATE335862T1 (en)
AU (2) AU6085601A (en)
BR (1) BR0110557A (en)
CA (1) CA2407975C (en)
DE (1) DE60122128T2 (en)
EA (1) EA004020B1 (en)
ES (1) ES2271011T3 (en)
MX (1) MXPA02010832A (en)
NO (1) NO20025261D0 (en)
PL (1) PL196101B1 (en)
SE (1) SE518531C2 (en)
SK (1) SK287060B6 (en)
UA (1) UA74369C2 (en)
WO (1) WO2001086011A1 (en)
ZA (1) ZA200208793B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101053365B1 (en) * 2003-12-23 2011-08-01 재단법인 포항산업과학연구원 Method for manufacturing ferro-chromium alloy using steel by-products
SE0402467D0 (en) * 2004-10-12 2004-10-12 Linde Ag A method and use of an apparatus for calcining
DE112006000570T5 (en) * 2005-03-11 2008-01-17 Linde Ag Method for feeding raw materials
US7513929B2 (en) * 2005-04-01 2009-04-07 Heritage Environmental Services, Llc Operation of iron oxide recovery furnace for energy savings, volatile metal removal and slag control
RU2403289C2 (en) * 2005-04-08 2010-11-10 Линде Аг Method for separating metallic iron from oxide
US7820126B2 (en) * 2006-08-18 2010-10-26 Iosil Energy Corporation Method and apparatus for improving the efficiency of purification and deposition of polycrystalline silicon
CN102067277B (en) * 2008-04-11 2013-09-18 伊奥西尔能源公司 Methods and apparatus for recovery of silicon and silicon carbide from spent wafer-sawing slurry
JP5612425B2 (en) * 2010-10-01 2014-10-22 大阪瓦斯株式会社 Powder heating device
KR101368541B1 (en) 2010-12-28 2014-02-27 주식회사 포스코 Smelting reductant for the use of molten stainless steel and a smelting reduction method using the same

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4358310A (en) 1981-02-18 1982-11-09 Midrex Corporation Dry collection of metallized fines
US4613371A (en) * 1983-01-24 1986-09-23 Gte Products Corporation Method for making ultrafine metal powder
US4654076A (en) * 1986-01-30 1987-03-31 Plasma Energy Corporation Apparatus and method for treating metallic fines
CH677195A5 (en) * 1989-02-09 1991-04-30 Fischer Ag Georg
DE4310931C2 (en) * 1993-04-02 1999-04-15 Air Prod Gmbh Method and device for disposing of dusts by burning / slagging in a cupola furnace
AT403055B (en) * 1993-05-07 1997-11-25 Voest Alpine Ind Anlagen METHOD FOR RECYCLING IRONIC WASTE OR RESIDUES
JP3274931B2 (en) * 1994-03-14 2002-04-15 日本ファーネス工業株式会社 Aluminum chip melting furnace
JPH08295956A (en) * 1995-04-27 1996-11-12 Daido Steel Co Ltd Treatment of waste in steelmaking and device therefor
JPH09184006A (en) * 1995-12-28 1997-07-15 Nippon Sanso Kk Method for melting iron raw material
JPH09310126A (en) 1996-05-16 1997-12-02 Daido Steel Co Ltd Production for obtaining metal from metallic oxide
AT403696B (en) * 1996-06-20 1998-04-27 Voest Alpine Ind Anlagen MELTING CARBURETTOR AND SYSTEM FOR THE PRODUCTION OF A METAL MELT
JPH11257615A (en) * 1998-03-10 1999-09-21 Daioo:Kk Burner for manufacturing spherical grain
JP2990180B1 (en) * 1998-09-24 1999-12-13 三宝伸銅工業株式会社 Apparatus and method for removing oil and moisture from copper-based alloy chips

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0186011A1 *

Also Published As

Publication number Publication date
UA74369C2 (en) 2005-12-15
SE0001661L (en) 2001-11-06
MXPA02010832A (en) 2003-03-27
JP2003532796A (en) 2003-11-05
DE60122128D1 (en) 2006-09-21
SE518531C2 (en) 2002-10-22
AU2001260856B2 (en) 2005-09-15
ZA200208793B (en) 2004-02-09
AU2001260856C1 (en) 2006-10-26
EP1278896B1 (en) 2006-08-09
CA2407975C (en) 2009-12-22
ES2271011T3 (en) 2007-04-16
AU2001260856B8 (en) 2005-10-13
SE0001661D0 (en) 2000-05-05
PL357865A1 (en) 2004-07-26
EA004020B1 (en) 2003-12-25
BR0110557A (en) 2003-04-01
PL196101B1 (en) 2007-12-31
ATE335862T1 (en) 2006-09-15
US20030136226A1 (en) 2003-07-24
SK287060B6 (en) 2009-10-07
CA2407975A1 (en) 2001-11-15
DE60122128T2 (en) 2007-03-08
SK17042002A3 (en) 2003-08-05
KR20030009467A (en) 2003-01-29
WO2001086011A1 (en) 2001-11-15
NO20025261L (en) 2002-11-01
US6989043B2 (en) 2006-01-24
KR100766346B1 (en) 2007-10-15
AU6085601A (en) 2001-11-20
NO20025261D0 (en) 2002-11-01
EA200201108A1 (en) 2003-04-24

Similar Documents

Publication Publication Date Title
AU714097B2 (en) Method of producing reduced iron pellets
CN1089429C (en) Electric arc furnace post combustion method
CN114096688B (en) Method and system for preparing low-carbon ferrochrome from chromite and prepared low-carbon ferrochrome
RU2144571C1 (en) Method of producing foundry pig iron
CA2407975C (en) A method and an apparatus for recovery of metals
AU2001260856A1 (en) A method and an apparatus for recovery of metals
US20120090984A1 (en) Method and apparatus for purifying a silicon feedstock
KR19990008192A (en) Method for recovering metal from iron oxide containing mass
NO830389L (en) PROCEDURE FOR THE MANUFACTURE OF FERROSILICIUM
WO2006107256A1 (en) A method for separating metallic iron from oxide
AU2002233862A1 (en) Method and treatment of sludge having particles comprising metal, metal oxide or metal hydroxide intermixed therein
WO2002066895A1 (en) Method and treatment of sludge having particles comprising metal, metal oxide or metal hydroxide intermixed therein
CA1055553A (en) Extended arc furnace and process for melting particulate charge therein
US20070215019A1 (en) Method and Use of an Apparatus for Recovery of Metals or Metal Compounds
NL2026572B1 (en) Process and system for melting agglomerates
JP3451901B2 (en) Operating method of mobile hearth furnace
CN105420503B (en) Silica-alumina supports noble metal reclaims joint disposal system
WO2024013581A1 (en) Method and system for thermal spent pot liner beneficiation
EA042981B1 (en) METHOD AND SYSTEM FOR OBTAINING LOW-CARBON FERROCHROME FROM CHROMITE ORE AND THE LOW-CARBON FERROCHROME SO PRODUCED
JPH09184006A (en) Method for melting iron raw material
WO2006096125A1 (en) A method of feeding raw materials
JPH07171537A (en) Incineration ash melting process

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20021025

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RIN1 Information on inventor provided before grant (corrected)

Inventor name: VON SCHEELE, JOACHIM

Inventor name: GRIPENBERG, HENRIK

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: LV RO SI

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060809

Ref country code: LI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060809

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060809

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60122128

Country of ref document: DE

Date of ref document: 20060921

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061109

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061109

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20070109

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2271011

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070510

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070503

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060809

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070503

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20090525

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20100329

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20100525

Year of fee payment: 10

Ref country code: ES

Payment date: 20100611

Year of fee payment: 10

Ref country code: FI

Payment date: 20100512

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20100512

Year of fee payment: 10

Ref country code: NL

Payment date: 20100501

Year of fee payment: 10

Ref country code: IT

Payment date: 20100515

Year of fee payment: 10

Ref country code: DE

Payment date: 20100430

Year of fee payment: 10

BERE Be: lapsed

Owner name: *AGA A.B.

Effective date: 20100531

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: TR

Payment date: 20100408

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100531

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20111201

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20110503

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110503

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111201

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 335862

Country of ref document: AT

Kind code of ref document: T

Effective date: 20110503

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20120131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110503

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110503

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60122128

Country of ref document: DE

Effective date: 20111201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110503

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20121116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110504

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110503